Tool-holder.



E. RAWSON.

TooL HOLDER.

APPLIUATLON FILED JAN. 2W?, 1909.

atenteo Mm'. 8, 1910.

Mme/vm p'rr f EDVTARD RAWSON, OF LEWISTON, IDAHO,

TOOL-HOLDER.

Specification of Letters Patent.

onrein.

Application filed January 27, 1909.

Serial No, 474,613.

To all whom it may concern:

Be it lrnown that I, EDWARD Rawson', a citizen of the United States, and a resident of Lewiston, in the county of Nez Perce and State of Idaho, have invented a new and linproved Tool-Holder, of which the iollowing is a full, clear, and exact description.

rlthe invention has reference to that class of tool holders or heads as are provided in connection with wood working `machines to carry molding knives, milling tools, saws etc.

The invention has .in view means by which the tool may be quickly applied and detached from the tool holder, consisting of a locking member journaled in the spindle, a clutch, a wrench journaled in the clutch, movable into and out of engagement with the locking member, and means for moving the clutch to engage and lock the spindle against rotation during the operation of the wrench.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate correspondmg parts 1n all, the views.

Figure 1 is a central vertical section` wrench disengaged; Fig. 2 is a similar view showing the clutch and wrench engaged, as when removing and applying the tool; and F ig. 3 is a fragmentary view of the adjacent ends of the spindle and clutch.

A hollow machine spindle 5 is journaled in bearings 6 and 7, at which points it is reduced in diameter t0 prevent relative endwise movement and at its forward end is constructed with one or more recesses 8, two being shown, arranged at diametrically opposite points. Within the rear end of the spindle is journaled a locking member 9, having a tubular internally-threaded inner end portion 10, and a head 11 at its outer end which is received in a counterbored portion of the spindle, and is provided with a circumferential groove 12, within which one or more screws 13 project from the spindle to hold the locking member in place. The head of the locking member is also transversely slotted and journaled in a clutch 111 which is adapted to engage the spindle and forms an extension of the rear end portion thereof. Vithin the rear or outer end portion of the clutch is journaled a wrench 15, the shank of which is reduced in diameter and provided with an operating handle 16 at the outside of the clutch. The wrench has a screw-driver point 17 movable into engagement with the slotted head of the locking member when the clutch is engaged with the spindle, as shown in Fig. 2. The rear bearing has an offset portion 6a constructed with an inner inclined or cam face coacting with the corresponding or counterpart face of a cam 18, the cam having an operating handle 19 and secured to the inner end of an arm 20, which in turn is connected at its opposite and outer end to the clutch ll, the arm having an olset end portion and the clutch having a collar by which this connection is effected. lnterposed between the portion ta of the bearing and a collar on the arm 2() is a surrounding spring 20a.

An arbor or shank 2l for carrying the tool has an inner threaded end 22 adapted to engage the tubular threaded end 10 of the locking member, and is provided at its outer end portion with a fixed collar 23 which has projecting pins 24 on its inner face adapted to engage in the recesses 8 of the spindle, and a boss 25 of a diameter to slidably tit within the bore of the spindle and properly center the arbor and tool at this end. The tool is secured to the arbor in any suitable manner, that shown being the conventional nut and washer 26 and 27 respectively.

In practice it will be found advantageous to provide a number of arbors 21 having various tools as are in use applied thereto, and when removing one tool and applying another the cam 18 is thrown to the position illustrated in Fig. 2, drawing the clutch and wrench inwardly and respectively engaging them with the spindle and the locking member, the engagement of the clutch operating to loclr the spindle against rotation, whereby when the wrench is revolved a relative rotary movement is set up between the lock ing member and the arbor, which in the case of removing the tool unscrews these parts at their threaded connection, when the tool together with the arbor may be removed and the arbor having the next tool required is inserted in the spindle and the operation of the wrench reversed to thread the locking member and arbor together, with the projections 24 of the collar 23 entering the recesses 8 and preventing the arbor from unscrewing by the action of the tool. On turning the cam 18 to the position Patented Mar. 8, 1910.

shown in Fig. 1, the spring 20a throws out the' clutch 14 and the Wrench 15, and per.- mits of the spindle 5 and locking member 9 revolving independently thereof.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. The combination of a revoluble spindle, a clutch, a tool carrier, a locking :member revoluble in the spindle and having means to engage and release t-he tool carrier by a rotary movement and lock the tool carrier to the spindle, a wrench jonrnaled in the clutch, movable into and out of engagement with the locking member, means for moving the clutch to engage and lock the spindle against rotation, and means for revolving the wrench.

2. The combination of a revolnble spindle, a clutch, a. tool carrier, a locking member revoluble in the spindle and having means to engage and release the carrier by a rotary movement and lock the tool carrier to the spindle, a wrench journaled in the clutch, and means to simultaneously move the clutch and Wrench respectively into engagement with the spindle and locking member.

3. The combination of a revoluble spindle, a clutch for locking the spindle against rotation, a tool carrier, a locking member revoluble in the spindle having means to engage and release the tool carrier by a rotary movement and lock the carrier to the spindle, and means to revolve the locking member.

4. The combination of a revoluble spindle, a tool carrier, a locking member revoluble in the spindle having means to engage and release the tool carrier by a rotary movement and lock the carrier to the spindle, means tor locking the spindle against rotation, and means for revolving the locking member, carried by the means for locking the spindle.

5. The combination of a revoluble spindle, a clutch for locking the spindle against rotation, a tool carrier, a locking member revolnble in the spindle having means to engage and release the tool carrier by a rotary movement and lock the carrier to the spindle, an arm connected with the clutch, a cam for operating the arm to move the clutch into engagement with the spindle, a spring for retracting the clutch when the cam is released, and means for revolvingr the tool locking member when the clutch is engaged.

6. The combination of a revoluble spindle, a tool carrier, a. locking member having a threaded engagement with the carrier to draw the carrier inwardly and lock it to the spindle, a clutch for locking the spindle against rotation, means for operating the clutch, and a wrench for revolving the tool locking member carried by the clutch.

7. The combination of ay spindle, an arbor, a locking member journaled in the spindle, having a threaded engagement with the arbor to draw the arbor inwardly and lock it to the spindle, a wrench for revolving the tool locking member to release and connect the arbor therewith, and means for moving the wrench into and ont of engage-v EDIVARD RAWSON.

litnesses J. HOWARD Howe, S. E. ARANT. 

